2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
The stalled boundary began to lift north during the day on the 17th but remained the focus of diurnal convection. While the front did eventually shift off to the east on the 18th, additional storms were able to fire with the lingering moist airmass as an upper level disturbance…
Read the full account →The stalled boundary began to lift north during the day on the 17th but remained the focus of diurnal convection. While the front did eventually shift off to the east on the 18th, additional storms were able to fire with the lingering moist airmass as an upper level disturbance…
Read the full account →The stalled boundary began to lift north during the day on the 17th but remained the focus of diurnal convection. While the front did eventually shift off to the east on the 18th, additional storms were able to fire with the lingering moist airmass as an upper level disturbance…
Read the full account →The stalled boundary began to lift north during the day on the 17th but remained the focus of diurnal convection. While the front did eventually shift off to the east on the 18th, additional storms were able to fire with the lingering moist airmass as an upper level disturbance…
Read the full account →The stalled boundary began to lift north during the day on the 17th but remained the focus of diurnal convection. While the front did eventually shift off to the east on the 18th, additional storms were able to fire with the lingering moist airmass as an upper level disturbance…
Read the full account →A deep upper trough and low pressure moving across the Ohio Valley pushed warm and humid air northward ahead of a cold front moving east with the surface low.
Read the full account →Low pressure moved north along the Atlantic Seaboard spreading steady and heavy rain into northeastern Pennsylvania during the overnight hours. Rainfall amounts of 2 to 4 inches were observed along with a considerable amount of melting snow into area rivers and streams.
Read the full account →A stationary frontal boundary draped over Northeast Pennsylvania triggered isolated, slow moving thunderstorms with heavy rain during the early to mid-afternoon.
Read the full account →A cold front supported scattered heavy rain-producing thunderstorms across Northeastern Pennsylvania. Multiple storms moved very slowly over the same townships of Lackawanna, Wayne and Pike counties.
Read the full account →Flooding and mudslides were reported in Freedom. Some houses were evacuated. The ground gave way under one house in Center Township. Flooding was reported at Crow's Run in New Sewickley Township and along Elkhorn Run in Monaca.
Read the full account →Tropical Storm Gordon came ashore along the central Gulf Coast on the night of September 4th. The tropical cyclone dissipated over Missouri by the night of September 7th.
Read the full account →Tropical Storm Gordon came ashore along the central Gulf Coast on the night of September 4th. The tropical cyclone dissipated over Missouri by the night of September 7th.
Read the full account →An excessively warm and humid airmass resided over northeastern Pennsylvania for several days. A weak surface boundary provided the focus for slow moving, conglomerated thunderstorms which produced several hours of locally heavy downpours.
Read the full account →Slow moving pulse storms created flash flooding conditions across the region. The storms developed in a very moist, buoyant environment where 2000-3000 J/kg SBCAPE and 1.7-1.9 inch PW values, supported very efficient rainfall rates.
Read the full account →Low pressure moved northeast through the Great Lakes and St. Lawrence River valley, bringing a plume of deep moisture into Northeast Pennsylvania. Rain, with embedded bands of thunderstorms, developed ahead of the low pressure area during the day of 31 October.
Read the full account →A slow moving warm front pushed northward across northeast Pennsylvania late in the afternoon on April 25th. A warm and relatively moist air mass covered the region, with showers and storms developing, especially in the unstable air south of the frontal boundary, where breaks in…
Read the full account →The remnants of Tropical Storm Lee moved northward from the southern Appalachians on the 6th to the middle Atlantic states on the 7th before stalling on the 8th.
Read the full account →A surge of warm air with high moisture content moved into the region during the early morning hours of the 12th. Moderate to heavy rain showers developed over north central Ohio extending into northwest Pennsylvania with several locations receiving over an inch of rainfall.
Read the full account →Thunderstorms developed ahead of a slow moving cold front tracking through Central and Eastern Pennsylvania during the afternoon and evening. Numerous thunderstorm complexes moved over the same locations in Susquehanna county producing up to 4 inches of rain in a short amount of…
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
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